Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a0b3fb1ec85974…

MALICIOUS

PDF

41.6 KB Created: 2021-05-13 13:20:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 656a1cf1485837e3f652f4c345bdcd80 SHA-1: 6c0aa90522d6094d27050b821790e3c129cc3171 SHA-256: 30a0b3fb1ec85974b5bf35863d31c7fbc6358b4e4c962b8fdfc7cbdfbcc61e85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The document body, though partially obfuscated, contains URLs that reinforce this lure. The primary malicious activity observed is the redirection to these potentially harmful sites, likely as a precursor to further malicious actions such as credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/www-coin-master-hack-tk-game-hack In PDF document text
    • https://iear.com.tw/image/data/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/master-free-spin_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/roblox-weird_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E4 24300 bytes
SHA-256: 42e7162bc3812f3b42a10dae7132c4dca7cb00dd5615a289dd522b77b3cece2e
font_01_sfnt_off00008086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8086 18080 bytes
SHA-256: 921193ab8241b15930f5390558d31b790c2cfead33e0a160f86367d1d668b4b0

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